what is a counterexample for the conjecture?
conjecture:Any number that is divisible by 2 is also divisible by 4.
A.32
B.12
C.40
D.18

the counter example involves finding a number that can be divided* by 2 but not 4.
work through each number and you will find one.
*everything is divisible by everything. the missing language here is that the "answer" must be a whole number.